Some factors affecting dilatation of the ovine cervix.
D000818:Animals; D002584:Cervix Uteri / Q000187:drug effects*; D005260:Female; D011247:Pregnancy; D011270:Pregnancy, Animal; D011374:Progesterone / Q000494:pharmacology; D012756:Sheep / Q000502:physiology*; D012757:Sheep Diseases; D014808:Vitamin D Deficiency / Q000662:veterinary
D011374:Progesterone